from The Century Dictionary.

  • noun An electrical instrument in which sounds are produced by the changes in the circuit due to variations of temperature.

from the GNU version of the Collaborative International Dictionary of English.

  • noun A portable form of telethermometer, using a telephone in connection with a differential thermometer.
  • noun A telephone involving heat effects, as changes in temperature (hence in length) due to pulsations of the line current in a fine wire connected with the receiver diaphragm.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun A form of transducer that generates sound waves of precise power


Sorry, no etymologies found.


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  • That discovery led to the invention of a device called the "thermophone", he says. News Feed 2008

  • He, however, adds that the thermophone produced a very weak sound, whereas the nanotube sheets can be very loud. News Feed 2008


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